pH Scale

Question 1

What is the pH scale?

Answer 1

The concentration of hydrogen ions is measured on a scale called the pH scale. The letters pH refer to the power or concentration of hydrogen ions.

Question 2

What are the ranges?

Answer 2

Ranges from 1 - 14
pH smaller than 7 (acids)
pH = 7 (neutral)
pH greater than 7 (bases)

Question 3

What are indicators?

Answer 3

An indicator is a substance that changes colour in the presence of an acid or base.

Question 4

Phen…

Answer 4

Phenolphthalein

Question 5

R & B LP

Answer 5

Red and blue litmus
Turn red on blue litmus paper (acid) - Red, orange or yellow.
Turn blue on red litmus paper (base) - Blur or Violet.

Question 6

R C

Answer 6

Red cabbage

Question 7

Uni… Indi…

Answer 7

Universal Indicator

Question 8

Met… Ora

Answer 8

Methyl orange

Question 9

Bro… Blu

Answer 9

Bromothymol blue

Question 10

What is the universal indicator?

Answer 10

Universal indicator is a mixture of different indicators.

It is more accurate because it indicates the strength or pH of the acidic or basic solution being tested.